why does my Ford Explorer Fifth Generation (2011-2019) have a knocking sound when accelerating

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

598 words

Problem Statement

Learn how to diagnose and fix knocking sound during acceleration in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic procedures.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow engine to cool before draining oil.

Symptoms

•Knocking noise that increases with acceleration
•Potential vibration felt in the vehicle
•Loss of power or sluggish acceleration
•Unusual engine sounds when under load
•Possible check engine light illuminated

Diagnostic Steps

1
Inspect the engine oil level and condition; low or dirty oil can cause knocking.
2
Scan for error codes using an OBD-II scanner to identify potential engine issues.
3
Check for loose or damaged engine mounts that could contribute to knocking sounds.
4
Inspect the exhaust system for any loose components that might rattle during acceleration.
5
Conduct a visual inspection of the drive belts and pulleys for wear or damage.
6
Listen closely to isolate the source of the knocking: is it coming from the engine, transmission, or suspension?

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Oil filter wrench
•Oil drain pan
•Funnel
•Jack
•Jack stands

Parts Required

•Engine oil (5W-20)
•Oil filter
•Engine mounts (if necessary)
•Exhaust hangers/clamps (if necessary)
•Drive belt (if necessary)

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Diagnostic Steps

1
Inspect the engine oil level and condition; low or dirty oil can cause knocking.
2
Scan for error codes using an OBD-II scanner to identify potential engine issues.
3
Check for loose or damaged engine mounts that could contribute to knocking sounds.
4
Inspect the exhaust system for any loose components that might rattle during acceleration.
5
Conduct a visual inspection of the drive belts and pulleys for wear or damage.
6
Listen closely to isolate the source of the knocking: is it coming from the engine, transmission, or suspension?

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is parked on a level surface, and engage the parking brake.
Disconnect the battery to prevent electrical shorts during repairs.

2. Engine Oil Check and Change

Sub-steps:
- Locate the oil dipstick and check the oil level.
- If low, add the recommended oil type (typically 5W-20 for this model).
- If dirty or old, drain the oil using a wrench to remove the oil drain plug, and replace it with new oil.
- Replace the oil filter using an oil filter wrench.
Tools Required: Oil filter wrench, socket set, oil drain pan, funnel.
Safety Warnings: Allow the engine to cool before draining oil.

3. Engine Mount Inspection and Replacement

Sub-steps:
- Visually inspect the engine mounts for cracks or wear.
- Use a jack to slightly lift the engine to relieve stress on the mounts.
- Remove the bolts securing the damaged mount and replace it with a new mount.
- Re-torque bolts to manufacturer specifications (typically 40-50 ft-lbs).
Tools Required: Socket set, torque wrench, jack, and jack stands.

4. Exhaust System Inspection and Repair

Sub-steps:
- Inspect the exhaust system visually for any loose clamps or damaged hangers.
- Tighten any loose bolts or replace worn hangers as necessary.
- If any parts are damaged, replace them with OEM or equivalent parts.
Tools Required: Socket set, exhaust hanger tool (if necessary).

5. Drive Belt and Pulley Inspection

Sub-steps:
- Check the condition of the drive belts for cracks or fraying.
- Inspect the pulleys for wear or misalignment.
- Replace any worn drive belts and adjust tension as needed.
Tools Required: Socket set, belt tension gauge.